Solubility products: temperature validity ranges

[Jicé]

Hello,

In all PhreeqC databases (at least in PhreeqC.dat), could you enlight us on the Solid Phases which solubility product is facing a water temperature validity range more restricted than [0;99](DegC)?

If so, could you share the source of such validity range?

Even if it's a world, I would want to ask the same question regarding all equilibrium constants;

Thank you guys!

[dlparkhurst]

To be honest, I try to stay out of the thermodynamic data business. The phreeqc.dat database is derived from the wateq4f.dat database; generally, it is a subset of the larger wateq4f.dat database. The sources of thermodynamic data are given in the WATEQ4F manual (http://wwwbrr.cr.usgs.gov/projects/GWC_chemtherm/pubs/wq4fdoc.pdf). You can check individual references there. To evaluate the entire set of minerals is a large undertaking.

[Jicé]

Thank you David for your reply, I'll check this document.